Conventions and beam vergence

Question 1

Cartesian Sign Convention (right, left)

Answer 1

Right (+), Left (-) Object location, image location, focal length, radius of curvature

Question 2

Cartesian sign convention (up, down)

Answer 2

up (+), down(-) Object height, image height

Question 3

magnification

Answer 3

ratio of image height to the corresponding object height

Question 4

M

Answer 4

image smaller

Question 5

M>1

Answer 5

larger

Question 6

M=1

Answer 6

no size change

Question 7

minus magnification

Answer 7

inverted

Question 8

plus magnification

Answer 8

upright

Question 9

What are the units of magnification

Answer 9

no units

Question 10

longitudinal magnification

Answer 10

ratio of image length, image length over object length

Question 11

angular magnification

Answer 11

How big it appear

Question 12

Virtual Object

Answer 12

Rays converge to, after the optical element

Question 13

Real object

Answer 13

Rays originate from it, before the optical element

Question 14

Real Image

Answer 14

Rays converge to it, After the optical element

Question 15

Virtual Image

Answer 15

Rays originate from, before the optical elelment

Question 16

What is the most critical parameter in optics

Answer 16

Beam Vergence. the inverse of the distance required to converge to a point

Question 17

convering

Answer 17

+

Question 18

Diverging

Answer 18

-

Question 19

diopter

Answer 19

inverse of a meter 1/m

Question 20

distance to focus

Answer 20

the larger the distance, the smaller the vergence. units m

Question 21

vergence

Answer 21

units: diopters. the larger the distance the smaller the distance to focus

Question 22

What is the property for changing mergence of beam?

Answer 22

optical power

Question 23

What does NOT change the vergence?

Answer 23

plane

Question 24

What kind of power does a lens have?

Answer 24

optical power, can bend and disperse beams